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Articles 1 - 30 of 108
Full-Text Articles in Life Sciences
A Method For Estimating Marine Habitat Values Based On Fish Guilds, With Comparisons Between Sites In The Southern California Bight, Alan Bond, John Stephens, Daniel Pondella, James Allen, Mark Helvey
A Method For Estimating Marine Habitat Values Based On Fish Guilds, With Comparisons Between Sites In The Southern California Bight, Alan Bond, John Stephens, Daniel Pondella, James Allen, Mark Helvey
Alan B. Bond
Habitat valuation is an essential tool for tracking changes in habitat quality and in adjudicating environmental mitigation. All current methods for estimating habitat values of coastal marine sites rely heavily on the opinion of experts or on data variables that can readily be manipulated to influence the outcome. As a result, unbiased, quantitative comparisons between the values of different marine habitats are generally unavailable. We report here on a robust, objective technique for the valuation of marine habitats that makes use of data that are commonly gathered in surveys of marine fish populations: density, fidelity, and mean size. To insure …
Reduction Of Fe(Iii), Mn(Iv), And Toxic Metal At 100 Degrees C By Pyrobaculum Islandicum, Kazem Kashefi, Derek Lovley
Reduction Of Fe(Iii), Mn(Iv), And Toxic Metal At 100 Degrees C By Pyrobaculum Islandicum, Kazem Kashefi, Derek Lovley
Derek Lovley
It has recently been noted that a diversity of hyperthermophilic microorganisms have the ability to reduce Fe(III) with hydrogen as the electron donor, but the reduction of Fe(III) or other metals by these organisms has not been previously examined in detail. When Pyrobaculum islandicum was grown at 100 degrees C in a medium with hydrogen as the electron donor and Fe(III)-citrate as the electron acceptor, the increase in cell numbers of P. islandicum per mole of Fe(III) reduced was found to be ca. 10-fold higher than previously reported. Poorly crystalline Fe(III) oxide could also serve as the electron acceptor for …
The Lin-4 Regulatory Rna Controls Developmental Timing In Caenorhabditis Elegans By Blocking Lin-14 Protein Synthesis After The Initiation Of Translation, Philip Olsen, Victor Ambros
The Lin-4 Regulatory Rna Controls Developmental Timing In Caenorhabditis Elegans By Blocking Lin-14 Protein Synthesis After The Initiation Of Translation, Philip Olsen, Victor Ambros
Victor R. Ambros
lin-4 encodes a small RNA that is complementary to sequences in the 3' untranslated region (UTR) of lin-14 mRNA and that acts to developmentally repress the accumulation of LIN-14 protein. This repression is essential for the proper timing of numerous events of Caenorhabditis elegans larval development. We have investigated the mechanism of lin-4 RNA action by examining the fate of lin-14 mRNA in vivo during the time that lin-4 RNA is expressed. Our results indicate that the rate of synthesis of lin-14 mRNA, its state of polyadenylation, its abundance in the cytoplasmic fraction, and its polysomal sedimentation profile do not …
Access To Another Mind: Naturalistic Theories Require Naturalistic Data, Mark A. Krause, Gordon Burghardt
Access To Another Mind: Naturalistic Theories Require Naturalistic Data, Mark A. Krause, Gordon Burghardt
Gordon Burghardt
If there is to be a natural theory of consciousness that would satisfy both philosophers and scientists, it must be based on naturalistic data and minimal clutter accumulated from semantic arguments. Carruthers offers a 'natural' theory of consciousness that is rather myopic. To explore the evolutionary basis of consciousness, a natural theory should include comparative psychological and neurological data that encompass nonlinguistic measures. Such an approach could provide a clearer picture of the adaptive function, mechanisms, and origins of consciousness.
Monogenic Control Of Iris Coloration In The January Tetra (Hemigrammus Hyanuary Characidae), Jack Frankel
Monogenic Control Of Iris Coloration In The January Tetra (Hemigrammus Hyanuary Characidae), Jack Frankel
Jack Frankel
Protection From Oxidative Stress–Induced Apoptosis In Cortical Neuronal Cultures By Iron Chelators Is Associated With Enhanced Dna Binding Of Hypoxia-Inducible Factor-1 And Atf-1/Creb And Increased Expression Of Glycolytic Enzymes, P21waf1/Cip1, And Erythropoietin, Kevin O'Donovan
Kevin O'Donovan
No abstract provided.
The Egr Family Of Transcription-Regulatory Factors: Progress At The Interface Of Molecular And Systems Neuroscience, Kevin O'Donovan
The Egr Family Of Transcription-Regulatory Factors: Progress At The Interface Of Molecular And Systems Neuroscience, Kevin O'Donovan
Kevin O'Donovan
No abstract provided.
Time Course And Temporal Order Of Changes In Movement Kinematics During Learning Of Fast And Accurate Elbow Flexions, D. Flament, M. Shapiro, T. Kempf, D. Corcos
Time Course And Temporal Order Of Changes In Movement Kinematics During Learning Of Fast And Accurate Elbow Flexions, D. Flament, M. Shapiro, T. Kempf, D. Corcos
Timothy Kempf
Learning of a motor task, such as making accurate goal-directed movements, is associated with a number of changes in limb kinematics and in the EMG activity that produces the movement. Some of these changes include increases in movement velocity, improvements in end-point accuracy, and the development of a biphasic/triphasic EMG pattern for fast movements. One question that has remained unanswered is whether the time course of the learning-related changes in movement parameters is similar for all parameters. The present paper focuses on this question and presents evidence that different parameters evolve with a specific temporal order. Neurologically normal subjects were …
Analysis Of Age And Growth In Two Eastern Pacific Groupers (Serranidae: Epinephelinae), Matthew Craig, Daniel Pondella, John Hafner
Analysis Of Age And Growth In Two Eastern Pacific Groupers (Serranidae: Epinephelinae), Matthew Craig, Daniel Pondella, John Hafner
Daniel Pondella
In an attempt to characterize species specific-growth rates of two Eastern Pacific groupers, individuals from two sympatric species, Epinephelus labriformis (n = 173), and Cephalopholis panamensis (n = 127), were collected at various localities in Mexico and the Galápagos archipelago in 1997 and 1998. Sagittal otoliths were removed, and age of each individual was determined by direct visual inspection of annuli present following sectioning. Length/weight relationships were determined, and growth curves were generated using the von Bertalanffy growth model. The two species demonstrated similar growth rates, yet, as determined by the von Bertalanffy parameters, E. labriformis tended towards a larger …
The Correlation Of Profiles Of Surface Ph And Elongation Growth In Maize Roots, Winfried Peters, Hubert Felle
The Correlation Of Profiles Of Surface Ph And Elongation Growth In Maize Roots, Winfried Peters, Hubert Felle
Winfried S. Peters
Keto Pure Diet: Shark Tank Reviews (Side Effects, Ingredients) Cost …, Keto Pure Diet Shark Tank
Keto Pure Diet: Shark Tank Reviews (Side Effects, Ingredients) Cost …, Keto Pure Diet Shark Tank
Keto Pure Diet Shark Tank
Action Of Repeat-Induced Point Mutation On Both Strands Of A Duplex And On Tandem Duplications Of Various Sizes In Neurospora, Michael Watters, Thomas Randall, Brian Margolin, Eric Selker, David Stadler
Action Of Repeat-Induced Point Mutation On Both Strands Of A Duplex And On Tandem Duplications Of Various Sizes In Neurospora, Michael Watters, Thomas Randall, Brian Margolin, Eric Selker, David Stadler
Michael Watters
In Neurospora crassa, DNA sequence duplications are detected and altered efficiently during the sexual cycle by a process known as RIP (repeat-induced point mutation). Affected sequences are subjected to multiple GC-to-AT mutations. To explore the pattern in which base changes are laid down by RIP we examined two sets of strains. First, we examined the products of a presumptive spontaneous RIP event at the mtr locus. Results of sequencing suggested that a single RIP event produces two distinct patterns of change, descended from the two strands of an affected DNA duplex. Equivalent results were obtained using an exceptional tetrad from …
The Saccharomyces Cerevisiae Ubiquitin-Proteasome System, Mark Hochstrasser, Phoebe Johnson, Cassandra Arendt, Alexander Amerik, Sowmya Swaminathan, Rob Swanson, Shyr-Jiann Li, Jeffrey Laney, Robin Pals-Rylaarsdam, Jonathan Nowak, Pamela Connerly, M. Yanagida, K. Nasmyth, M. Tyers, R. Hunt, J. Diffley
The Saccharomyces Cerevisiae Ubiquitin-Proteasome System, Mark Hochstrasser, Phoebe Johnson, Cassandra Arendt, Alexander Amerik, Sowmya Swaminathan, Rob Swanson, Shyr-Jiann Li, Jeffrey Laney, Robin Pals-Rylaarsdam, Jonathan Nowak, Pamela Connerly, M. Yanagida, K. Nasmyth, M. Tyers, R. Hunt, J. Diffley
Rob Swanson
Our studies of the yeast ubiquitin-proteasome pathway have uncovered a number of general principles that govern substrate selectivity and proteolysis in this complex system. Much of the work has focused on the destruction of a yeast transcription factor, MAT alpha 2. The alpha 2 protein is polyubiquitinated and rapidly degraded in alpha-haploid cells. One pathway of proteolytic targeting, which depends on two distinct endoplasmic reticulum-localized ubiquitin-conjugating enzymes, recognizes the hydrophobic face of an amphipathic helix in alpha 2. Interestingly, degradation of alpha 2 is blocked in a/alpha-diploid cells by heterodimer formation between the alpha 2 and a1 homeodomain proteins. The …
Phd Thesis (Doctorat De Spécialité): Université De Ouagadougou, 1999. Dr. Mamoudou H. Dicko. Purification Et Propriétés Physico-Chimiques Des Enzymes De Curculigo Pilosa, Gladiolus Klattianus Et Boscia Senegalensis Catalysant L'Hydrolyse Des Polysaccharides (Amidon Et Béta-Glucanes), Mamoudou H. Dicko Prof.
Pr. Mamoudou H. DICKO, PhD
The objective of this study was the research of novel and inexpensive sources of polysaccharides degrading enzymes such as amylases and glucanases from local plants in order to justify their biotechnological applications. The isolation of two l3-amylases and an endo-1,3-ß-D-glucanase was reached using common protein purification methods such as buffer extraction, ammonium sulfate fractionation, ionexchange and gel filtration chromatographies. The methods used were simple and easily reproducible, suggesting the possibilfty of large-scale production. ln the crude extract of Curculigo pilosa tuber, only ß-amylase was detected as starch degrading enzyme and its activity was approximately 282 Uig of fresh material. The …
Jual Obat Bius Asli Di Malaysia Wa: 0856 4702 0096, Toko Amanah
Jual Obat Bius Asli Di Malaysia Wa: 0856 4702 0096, Toko Amanah
Toko Amanah
New Developments In A Hazard Identification Algorithm For Hormone Receptor Ligands, Steven P. Bradbury, Ovanes Mekenyan, Nina Nikolova, Stoyan Karabunarliev, Gerald T. Ankley, Bjorn Hansen
New Developments In A Hazard Identification Algorithm For Hormone Receptor Ligands, Steven P. Bradbury, Ovanes Mekenyan, Nina Nikolova, Stoyan Karabunarliev, Gerald T. Ankley, Bjorn Hansen
Steven P. Bradbury
Recently we described the Common REactivity PAttern (COREPA) technique to screen data sets of diverse structures for their ability to serve as ligands for steroid hormone receptors [1]. The approach identi®es and quanti®es similar global and local stereoelectronic characteristics associated with active ligands through a comparison of energeticallyreasonable conformer distributions for selected descriptors. For each stereoelectronic descriptor selected, discrete conformer distributions from a training set of ligands are evaluated and parameter ranges common for conformers from all the chemicals in the training set are identi®ed. The use of discrete partitions of parameter ranges to de®ne common reactivity patterns can, however, …
The Timing Oflin-4rna Accumulation Controls The Timing Of Postembryonic Developmental Events Incaenorhabditis Elegans, Rhonda Feinbaum, Victor Ambros
The Timing Oflin-4rna Accumulation Controls The Timing Of Postembryonic Developmental Events Incaenorhabditis Elegans, Rhonda Feinbaum, Victor Ambros
Victor R. Ambros
The lin-4 gene encodes a small RNA that is required to translationally repress lin-14 toward the end of the first larval stage of Caenorhabditis elegans development. To determine if the timing of LIN-14 protein down-regulation depends on the temporal profile of lin-4 RNA level, we analyzed the stage-specificity of lin-4 RNA expression during wild-type development and examined the phenotypes of transgenic worms that overexpress lin-4 RNA during the first larval stage. We found that lin-4 RNA first becomes detectable at approximately 12 h of wild-type larval development and rapidly accumulates to nearly maximum levels by 16 h. This profile of …
The Use Of Multimedia In Large Classrooms, Don Morrow
The Use Of Multimedia In Large Classrooms, Don Morrow
Donald Morrow
No abstract provided.
The New Technologies And The University Classroom: The Changing Roles Of Faculty And Instructional Developers, Don Morrow
Donald Morrow
No abstract provided.
Bionatrol Cbd Oilbenefits:, Intelli Flare
Bionatrol Cbd Oilbenefits:, Intelli Flare
intelli Flare
The C. Elegans Homeodomain Gene Unc-42 Regulates Chemosensory And Glutamate Receptor Expression, Renee Baran, Rachel Aronoff, Gian Garriga
The C. Elegans Homeodomain Gene Unc-42 Regulates Chemosensory And Glutamate Receptor Expression, Renee Baran, Rachel Aronoff, Gian Garriga
Renee Baran
Genes that specify cell fate can influence multiple aspects of neuronal differentiation, including axon guidance, target selection and synapse formation. Mutations in the unc-42 gene disrupt axon guidance along the C. elegans ventral nerve cord and cause distinct functional defects in sensory-locomotory neural circuits. Here we show that unc-42 encodes a novel homeodomain protein that specifies the fate of three classes of neurons in the Caenorhabditis elegans nervous system: the ASH polymodal sensory neurons, the AVA, AVD and AVE interneurons that mediate repulsive sensory stimuli to the nematode head and anterior body, and a subset of motor neurons that innervate …
Cell Cycle-Dependent Sequencing Of Cell Fate Decisions In Caenorhabditis Elegans Vulva Precursor Cells, Victor Ambros
Cell Cycle-Dependent Sequencing Of Cell Fate Decisions In Caenorhabditis Elegans Vulva Precursor Cells, Victor Ambros
Victor R. Ambros
In Caenorhabditis elegans, the fates of the six multipotent vulva precursor cells (VPCs) are specified by extracellular signals. One VPC expresses the primary (1 degrees ) fate in response to a Ras-mediated inductive signal from the gonad. The two VPCs flanking the 1 degrees cell each express secondary (2 degrees ) fates in response to lin-12-mediated lateral signaling. The remaining three VPCs each adopt the non-vulval tertiary (3 degrees ) fate. Here I describe experiments examining how the selection of these vulval fates is affected by cell cycle arrest and cell cycle-restricted lin-12 activity. The results suggest that lin-12 participates …
Woman-Measuring-Stomach-1296x728.Jpg, Antonio Hanson
Woman-Measuring-Stomach-1296x728.Jpg, Antonio Hanson
antonio hanson
Changes In Movement Parameters Occur At Different Rates When Learning A Wrist Movement, T. Kempf, D. Corcos, D. Flament
Changes In Movement Parameters Occur At Different Rates When Learning A Wrist Movement, T. Kempf, D. Corcos, D. Flament
Timothy Kempf
No abstract provided.
Obat Kuat Viagra Usa Asli Bekasi Call: 082 243 552 651, Krisna Shop
Obat Kuat Viagra Usa Asli Bekasi Call: 082 243 552 651, Krisna Shop
KRISNA SHOP
What Can Be Said About Bionatrol Full-Spectrum Cbd Oil’S Quality?, Biona Trol
What Can Be Said About Bionatrol Full-Spectrum Cbd Oil’S Quality?, Biona Trol
biona trol
Does Dietary Valley Keto Work?, Valley Keto
Does Dietary Valley Keto Work?, Valley Keto
valley keto
Xet-Related Genes And Growth Kinematics In Barley Leaves, Winfried Peters, Wieland Fricke, Peter Chandler
Xet-Related Genes And Growth Kinematics In Barley Leaves, Winfried Peters, Wieland Fricke, Peter Chandler
Winfried S. Peters
Advantages Of Renuvastack Garcinia, Velofel Dk
Advantages Of Renuvastack Garcinia, Velofel Dk
velofel dk
The Amount Does Vasa-Max Male Enhancement Cost?, Vasa Max